Day 12 solution

Okay, I had to seek some advice on this one. The orbital period + least-common-multiple solution was not coming to me naturally.

inputs/12p.txt

@@ -0,0 +1,4 @@
+<x=14, y=4, z=5>
+<x=12, y=10, z=8>
+<x=1, y=7, z=-10>
+<x=16, y=-5, z=3>

inputs/12s1.txt

@@ -0,0 +1,4 @@
+<x=-1, y=0, z=2>
+<x=2, y=-10, z=-7>
+<x=4, y=-8, z=8>
+<x=3, y=5, z=-1>

inputs/12s2.txt

@@ -0,0 +1,4 @@
+<x=-8, y=-10, z=0>
+<x=5, y=5, z=10>
+<x=2, y=-7, z=3>
+<x=9, y=-8, z=-3>